1206.4—Time limits on applications.
Except in unusual or extraordinary circumstances, the National Mediation Board will not accept an application for investigation of a representation dispute among employees of a carrier:
(a)
For a period of two (2) years from the date of a certification covering the same craft or class of employees on the same carrier, and
(1)
The Board dismissed a docketed application after having conducted an election among the same craft or class of employees on the same carrier and less than a majority of valid ballots cast were for representation; or
(2)
The Board dismissed a docketed application covering the same craft or class of employees on the same carrier because no dispute existed as defined in § 1206.2 of these rules; or
(3)
The Board dismissed a docketed application after the applicant withdrew an application covering the same craft or class of employees on the same carrier after the application was docketed by the Board.